সব প্রশ্নে ফিরে যান
Math
A can do a piece of work in 4 hours, B and C together can do it in 3 hours , while A and C together can do it in 2 hours. How long will B alone take to do it?
A) 8 hours
B) 10 hours
C) 12 hours
সঠিক উত্তর
D) 24 hours